/*
 * Copyright 2012 Gregor Schauer
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package at.schauer.gregor.vienna.convert.vienna.lang;

import at.schauer.gregor.vienna.convert.factory.ConverterFactory;
import at.schauer.gregor.vienna.convert.factory.ConverterFactoryAware;
import at.schauer.gregor.vienna.convert.vienna.base.ToStringConverter;
import at.schauer.gregor.vienna.exception.ViennaException;

import javax.annotation.Nonnull;

/**
 * @author Gregor Schauer
 */
public class CharacterConverter extends ToStringConverter<Character> implements ConverterFactoryAware {
	@Override
	public Character sourceToTarget(String source, Class<? extends Character> targetClass) {
		if (source.isEmpty()) {
			return null;
		}
		if (source.length() == 1) {
			return source.charAt(0);
		}
		throw new ViennaException();
	}

	@SuppressWarnings("unchecked")
	@Override
	public void setConverterFactory(@Nonnull ConverterFactory converterFactory) {
		converterFactory.register(char.class, this);
		converterFactory.register(Character.class, this);
	}
}
